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Neuroimaging in acute stroke is needed to define the diagnosis, treatment, and establish the prognosis of the patient. Magnetic resonance and its different techniques have revolutionized neurology practice due to its greater definition of structures. Tractography is obtained by diffusion tensor imaging, which evaluates the diffusion of water molecules and creates an indirect representation of the integrity of white matter tracts. The use of tractography has focused on the prediction of motor outcome; however, its results are controversial. In this review, we explain how tractography is obtained and how the information is interpreted and translated into clinical practice. We discuss the role of tractography of the corticospinal and supplementary motor tracts in predicting the motor and functional outcome after acute stroke.

Abstractobjective Some neurocysticercosis cysts may remain hidden despite novel MRI sequences. This study evaluates the diagnostic value of gadodiamide (GDD)-contrasted MRI cisternography in selected cases of neurocysticercosis.methods We included patients aged 18-65 years with a probable diagnosis of subarachnoid cysticercosis in whom previous neuroimaging studies failed to demonstrate the presence of cysts. One millilitre of GDD was administered intrathecally as a contrast agent with subsequent performance of MRI.results Fourteen patients were included. Optimal contrast diffusion was achieved in nine patients, and partial diffusion was achieved in 4. Intracranial vesicles were identified in 10 patients, with the presence of more than 60 basal subarachnoid vesicles being revealed in all, with five cysts in the fourth ventricle in four patients and a floating cyst in the lateral ventricle in one. In one case, intrathecal GDD demonstrated spinal cysticercosis. No adverse events were reported after intrathecal GDD administration.

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